It refers to when you look at a person and they look so good it makes you sick, used esp. for females/drag queens/transexual females checking out other females/drag queens/transexual females - but meant completely as an admiration (with a slight connotation of politically acceptable jealousy)

This refers to somthing that is fabulous, over the top, fierce, the "T", eating it, flawless, frieghtening, nervous talent, etc. All terms coveted by the GBLTQ communities describing something that is extremely pleasing.

Mrs. thing was wearing the most sickening gown I had ever seen. She was just fierce!

The definition of a girl who really just makes you feel nauseated when seeing/thinking of/hearing of. Probably ugly, probably fat, stay away from these girls as your friends will laugh about you behind your pathetically-desperate-as-shit back.

nigga #1: What the fuck is wrong with you, you desperate-retarded-piece of shit. Don't try and make yourself feel better by thinking I'd date a fucking overweight nasty bitch like that! That's you! L-O-fucking-L.